Stopping means for weft replenishing looms



Feb. 10, 1948. v, F, SEPAVICH 2,435,699

STOPPING MEANS FOR WEF'I REPLENISHING LOOMS Filed March 18, 1946 INVENTOR VICTOR E SEPAWCH ATTORNEY l 'atented Feb. 10, 1 948 STOPPING MEANS FOR WEFT REPLENIS H- ING LO Victor F. Sepavich, Worcester, Mass; assignor to Crompton & Knowles Loom Works, Worcester,

Mass., a corporation of Massachusetts Application March 18, 1946, Serial No. 655,104

7 Claims. (Cl. 139-290) This invention relates to improvements in weft replenishing looms and it is the general object of the invention to provide simple and effective means for stopping the loom in the event that a shuttle is improperly placed for transfer on a weft replenishing beat of the loom.

Weft replenishing looms ordinarily employ a transferrer arm which on the replenishing beat of the loom moves downwardly to insert a fresh bobbin into the depleted shuttle. The transferrer OMS Fig. is a diagrammatic view showing the electric circuit by which the switch on the shuttle poarm and bobbin move along a fixed path, but the shuttle may come to rest 'at the end of the lay placed either for a proper transfer or misplaced sufficiently to interfere with correct movement of the fresh bobbin into the shuttle. Shuttle position detectors are ordinarily used to revoke transfer if the shuttle is misplaced, but these detectors do not always operate if the shuttle is only slightly misplaced.

It is an important object of my present invention to provide a shuttle position detector with an electric switch which will be closed by a misplaced shuttle on a transferring beat of the loom and thereby effect actuation of an electro-magforth.

In the accompanying'drawings, wherein two forms of the invention are shown,

Fig. 1 'is a side elevation of the preferred form of my invention and part of the weft replenishing mechanism set for a replenishing operation and indicating the lay in cross section,

Fig. 2 is a front elevation of the shuttle position detector and shuttle looking in the direction of arrow 2, Fig. 1 showing the shuttle properly placed in full lines and improperly placed in dotted lines, 7 v

Fig. 3 is an enlarged side elevation looking in the direction of arrow 3, Fig. 2, showing the manner in which a misplaced shuttle closes the switch on the shuttle position detector, n

Fig. 4 is a vertical section through the switc mechanism mounted on the shuttle position detector, q

sition detector initiates loom stoppage, and

Fig. 6 is. a view similar to Fig. 3 on a reduced scale showing a modified form of the invention.

Referringparticularly to Fig. 1, the loom frame it supports a weft replenishing mechanism I l which in thepresent instance may be of the stationary four-cell type. This mechanism has vertical bobbin delivery'controlling slides 12 and a transferrer arm l3 pivoted'as at I l-to the magazine footl5. A transfer latch i6 is pivoted as at I! to thetransferrer arm and is normally down from the position shown in Fig. 1, but is raised to transfer'position asset forth in Fig. 1 by a vertically extending rod 18. The latter is ordinarily down but when areplenishing operation is called rod 18 is raised to lift the latch [6 into the path of a hunter I 9 on the lay 20. Prior to arrival of the shuttle S at the magazine side of the loom a bobbindesignated at B will have been released from the magazine by one or another of the vertical slides 12 and be in the transfer position shown in-Fig. 1 under the transferrer arm; As thelay advances the hunter I9 engages the latchl6 and rocks the transferrer arm I 3 in a counter-clockwise direction as viewed in Fig. 1 to move the bobbin B downwardly into the shuttle S. The transferrer arm andbobbin move in a fixed vertical pathbut the shuttle moves across thelay and can assume difierent positions relatively to the path of the descending bobbin in certain of which it is not properly placed for transfer. It is "desirable to prevent transfer if the shuttle is not properly positioned to receive the bobbin B.

It has been customary in the past to employ shuttle position detectors for the purpose of revoking operation of the transferrer arm if the shuttle is too widely misplaced. Part of such mechanism is 'shown'in Fig. 1 and includes the shuttle position detector member or detector D which is secured bybolt 25 to a detector holder 26 pivoted to the magazine as at 21. An upwardly extending rod 28 is'pivoted as at 29 to the holder 26 and is normally in raised position so that the detector D is above the path of the shuttle as the lay swings back and forth on non-transferring beats of the loom. When a transfer operation is called rod 28 moves downwardly as rod 1 8 rises and the detector D is lowered to the position shown in Fig.1.

The detector D'jhas a shank 35 by means 'of which it may be bolted to the holder 26 and has o s w w relrs ie eies a e 3 terminating in an upwardly and forwardly extending projection 31. The under surface of the detector D is rounded as at 38 and is engaged by the shuttle if the latter is misplaced on a replenishing operation, or if the shuttle is properly placed sur- 5 face or edge 38 will be engaged by a vertical wall 39 carriedbyiithe la .behind theshuttlef S. *This bunter 11 passes under the latch 14 and the shipper handle can remain in the running position. When electrodes 65 and 66 are electrically connected as already described by depression of lever 50 the following circuit will be completed: transform er T, wire 8|], contacts 65 and 66in switch iuiit E,wire"8l,-solenoid10,and wire 82 back to latter engagement will occur later in the forthe"transformer. Closure'of this circuit enerward beat of the lay than shuttle engagement gizes the solenoid and causes the latter to move and is the usual means by which the detector'D I'Gthe latch 14 downwardly against the action of is raised and the magazine 'ies'et. H I F -sjcririg 16'"-intothe"path of bunter TI, and as the The matter thus far described is of common may advances the bunter will engage the latch 14 construction in multicolor weftl replenishing and rocl; the shipper handle in a left hand looms and of itself forms'he;pm rjmy mejsem d 'wedln Fi 5 to p h 100m. invention except for thechanges-which I. have LQV1: 5u;f 1QI'Xfi? y holds the arm 41 with its made in the shuttle position detector: as set forth bottom edge- 8 3 egrtended somewhat beyond the hereinafter. 'ailjacenli euived edge 38 of the detector D, and In carrying my invention into efiect lirprovide whenthe latter is lowered to the position shown a shuttle engaging lever 45 pivoted at 46 to the in Fig. 1 arm 41 is in position for engagement withthe shuttle. If fthe shuttle is completely "taxed as 'hdrc temrurr lirie'sin Fig. 12]; it will I g1 withoutt c] ng the detector-D al 39 I fthen en'gage to ts o alb itiongf rms normalre's'ttirigbf the d ector :tliere'fore"'d'o 'esfrlot electrically afiect flafadv'a'nces"andrpck; levefiepercre engaging 'j'edfgje"3 8 of 'detector"D, therebyrhovihg the-ilever o uc'wnt 'clo'se'jthe"previously tracedfieir uit.

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et t e mad p e era y h f j l tim ter erand havin veni i h 'eh' bliiiig'er 51 is slidably mpufnted fflfhis plunger rests on a sheetmetal spring 58 anchg d or otherwise "se- "cured to the casingji asatii Spring'58 tends Y normally to rernain in -an -;up position and causes! ror adequate box-like W Y mamast ema ic i -Bi eiiciiw i e m h 'I or to the right; spring, 58 "acting through plunger "'S'lfandleverbflwill restore '1ever'45 to its normal position relatively'to the detector D. Ihe dge v 83 of arm 41 is of sufilcientlength to provide'time energization' oi'the solenoid 10. It

e e n .it tn ma xpge iqng U h v. Spring-"8 urv s1 dewewerdl a a 5. a xii ifittaf h fi.51 3-3vfl ?.sm f fg a ,lSplin a 1, v et es in fil is .att e d-e1at. 3 to a fi 'fl v f' .1 the" sw h "A wniri Fi .6 the ysnap'spring 64 securedjaq anelectrode 65whi'ch I efZfifhadmodnted thereon ashuttleposition is heldbetweenparts of the easing 55.; A-spring etoif'iiiigefiilfl "shaped "somewhat similarto xfilec mde fiei su-la irpmf e el t od 6 a i detector lo heir e f 'i ttend ntqrrthe ca i lflnqshaefi .qqme tbl fiw m n n Y 9 P i fi Y 61 iQr engagementwith-a second contact button "d'ori 19 0 ancl" 'has aq'eve'r 92siriiilarto cent ammin .5 a. l ve wt wi red r ww nd e-e I-he parts within thespringeasing are norat. 93 te'havthe' sam jgenem ttmpu'r as the ;-.ma yl :in the. pos i n shqwntin tbutw tllim eri f1 E ,"fq f f ,LIt"'isffi t 55 :thou'g'htnecessarytoillustrate th interior f the switch unit 9 I sii'lc "thesamewiu bfisu'bsthtitilly as already described in connection withl 'ig'fd ,-;r nanner as to'paus e compression of spring 6|. "There a spring intheffswi'tchji'ir'iit '9lfthefsame ;;A r e o ne ion-6{has-re h d a e v p s a -1 m s fifi l tion inits downward motion corresponding to: a '60 92f'irithepos ition shownun'FigT 6 withitsv1'ower critical compression r; spring el the; latter will feurvjed" enqilccat ed'for'ngagen "with ami sexert an upward force on the 3 1. Spring 64 and "placed shijttle. :"Wheri'thils 'fe'nga dflthe'leverfl causethe'latter to rise, therebyeflfectingelectric will movetdthe i'lght as'viewedfmf'Fig sii'm contact between the buttons 6"! and 6 8. .Under ""11""per'ate t close,afcontactwithinthe these conditions the electrodes 65 and 66 are jfu 9!. [*I ;Iatter'wilIbecoimectedtothe wiifes electrically connected. .7 v a; r M H Bllfand Blfaridwill operateto close thecir clilt Fig. sshows an ele trie circuit which controls "sho'wn'in Figl'5'whenever lever 92is engagdfby loom operation. This circpit includes a; trans- H a misplacedshuttle. After shuttleeiiga enie'iit .-former",T and; a solenoid {l0 having a core H j'lever azjwnragainmovrearwa iy to its'iiormal connected 'toa vertical rod 'lg the upper :endof 76.7'pos'ition,thespringffor'acoinplishingthidfeiilt which is pivoted as at I3 to azlmockofl latc'h 14 'bei'ngin 'u'riit 9| and""r'no'urited on thedet tbr 1 11 h 0m: em enh ns e; M in 16 fin e th rmal hold he la ch? i r s d po it 1 lever 50 is depressed plunger! will bend spring v v a H Y eg lgi' h jrsrf goitgitwim'befseenithat i'have ;ab9ye the level; ag-kgoglgog' bynter jl 'l o n the provided a"shiittle"pbsitiondet"etoi haviiig'ian Jay 20. During normal operation of the loom the electric switch unit mounted thereon sob6nsi'oori'asthe shuttle passes "t e position accuses mally in shuttle engaging position relatively to the detector. The switch on the shuttle posisition detector is a self-contained electrical unit returning automatically to normal open position after closure by a shuttle. In both forms of the invention the lever which engages the shuttle is returned automatically to its normal position by a spring mounted on the shuttle position detector. In the preferred form of the invention a lever 45 is introduced between the misplaced shuttle and the lever 50 which is mounted on the switch unit E. In the modified form of the invention a somewhat simpler arrangement is used in which lever 45 is omitted and a lever 92 corresponding to lever 50 of the preferred form is shaped similarly to arm 41 of lever 45 for engagement with the misplaced shuttle.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the de tails herein disclosed, but what I claim is:

1. In a shuttle position detector for a weft replenishing loom, a switch unit including a normally open electric switch mounted on said detector, means on the detector movable from the normal position thereof to effect closure of said switch, and resilient means on said detector forming part of said switch unit effective to open said switch after closure thereof.

2. A shuttle position detector for a weft replenishing loom, having mounted thereon electric contacts supported by the detector, a lever pivotally mounted with respect to the detector, and resilient means mounted on the detector normally maintaining said contacts spaced but movable to eifect engagement of said contacts, said resilient means also maintaining said lever in normal position, said lever movable relatively to the detector to move said resilient means to effect engagement of said contacts and said resilient means effective thereafter to return said lever to normal position and space said contacts.

3. A shuttle position detector having mounted thereon a switch unit including a normally open electric switch, a lever pivoted on the detector, and resilient means forming part of the unit movable by the lever to close said switch and efiective to open said switch.

4. A shuttle position detector having mounted I thereon a switch unit including a normally open electric switch, a lever pivoted on the detector and having a given normal position relatively 6 to the detector, and resilient means forming part of the unit normally maintaining said switch open and said lever in normal'position but movable by said lever to close said switch.

5. In a shuttle position detector for a Weft replenishing loom, a switch unit including a normally open electric switch and a casing inclosing and supporting said switch and secured to the detector, a lever supported by the detector and mounted for pivotal movement relatively thereto, and resilient means within said casing normally maintaining said switch open and said lever in normal position butmovable by said lever to close said switch, said resilient means thereafter Opening said switch and returning said lever to normal position.

6. In a shuttle position detector for a weft replenishing loom, a switch unit including a normally open electric switch and a casing inclosing and supporting said switch and secured to the detector, a lever pivoted on said casing, resilient means within said casing normally maintaining said switch open and said lever in normal position, and a second lever pivoted to the detector and engaging the first lever and movable relatively to the detector to cause said first lever to overpower said resilient means and cause the latter to close said switch, said resilient means thereafter opening said switch and returning the first lever to normal position.

7. In a shuttle position detector for a weft replenishing loom, a switch unit including a normally openelectric switch and a casing incloslng and supporting said switch and secured to the detector, a lever pivoted to said casing and having apart thereof extending beyond the outline of the detector for movement relatively to the latter by a misplaced shuttle when the lever is in normal position relatively to the detector, and resilient means within said casing normally maintaining said switch open and said lever in normal position, said lever being movable in a direction causing said part thereof to move toward said outline to cause said resilient means to close said switch.

VICTOR F. SEPAVICH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,263,983 Darwin Nov. 25, 1941 

